Ventilator.



PATENTED APR. 5, 1904.

L. M. WOOD. VENTILATOR. APPLICATION FILED APR. 21, 1902.

vizt' UNITED STATES Patented A rils, 1904.

PATENT OFFICE.

LOUIS M. woon, or TOPEKA, Kansas.

VENTILATOR.

srncrrrcarr ori forming part of Letters Patent 110.756,?62, dated A ril5, 1904.

' Application filed .April 21, 1902. Serial a 104,001., on model.)

To allwhom it may concern.- v

I Be it known that I, Louis M. W001), a citi zen of the United States,residing at Topeka, in the county of Shawnee and State of Kansas, haveinvented certain new and useful Improvements in Ventilators, of whichthe following is a specification. I

This invention relates to that class of ventilators known as revolvingventilators, and particularly to ventilators having arevolving portionwhich may be mounted at the top of an air-shaft or chimney to revolvethereon in conformity with the direction of the wind and having an airor draft passage communicating with the upright air-shaft upon whichsuch revolving portion is mounted,

It relates, further, to the means employed for mounting the revolvingportion upon and incommunicatioh with the air-shaft or rigid portion.

. It relates, further, to the relative size and shape of the inlet andoutlet openings in the revolving hood portion and to the means fordividing the main draft-passage into a plurality of passages andcompressing the air admitted and permitting its expansion within theventilating or main draft passage.

I 'It relates, further, to the position and shape.

of the air-compressing means with relation to the air-shaft passage andto the revolving air or main draft passage, whereby such air-compressingmeans is enabled to perform its functions without materially obstructingeither of such passages or injuriously affecting the connectionstherebetween.

It relates, further, to the combination of the above elements in themanner herein shown,described, and claimed whereby a simple, economical,and efficient ventilator is formed having a hood or cowl portionprovided with a main draft-passage adapted to revolve in con formitywith thedirection of the wind and provided with means for compressing anair which enters the inlet-opening and permitting such air to expandwithin the main draft-passage and dividing such passage into a pluralityof passages of the desired shape and length, whereby the action of thewind is so controlled and modified within the passage as to produce anartificial draft.

vide such ventilator with means for compressing the air admitted theretoat desired points and permitting its expansion while in the maindraft-passage, so as to produce an ar' .tifieial current or draft in theair-shaft, or 'chimneyr A further object of the invention is to providemeans whereby the expansion of the air will be caused to take .place atdifferent de- 'sired points in the ventilating-passage by dividing themain draft-passage into separate passages of various lengths and of thedesired conformation, thus also producing currents of different densityand volume flowing. in the direction of the outlet-opening and soproportioned and located as to cause the desired artificial draft andthe minimum of eddying currents within such passage. i Y

The invention consists in the features, com binations, and details ofconstruction herein after described and claimed.

In the accompanying drawings, Figure l is a side, elevation ofmy'improved ventilator;

Fig. 2, an end elevation looking from the wind; Fig. 3, a verticalsectional view taken on line 3 of Fig; 2 looking in the direction of thearrow; Fig. 4 a detail of the roller-bearing on which theventilating-cowl revolves; Fig. 5, a vertical sectional detail view ofsuchrollerbearing mechanism; Fig. 6, an end elevation of the ventilatorlooking oppositely to Fig. 2 and toward the wind, and Fig. 7 a detailplan view of the open-work base inwhich the bottom of the verticalcowl-supporting shaft is pivotally mounted.

In constructing a ventilator in accordance with my improvements Iprovide an upright. cylindrical air-shaft portion a of the desireddimensions. which forms the top of the main air-shaft, to which it maybe attached or of the top of the air-shaft which itmay bemade anintegral part. Above this cylindrical air-shaft portion 1s 'mountedacowl 6, having a downwardly-extending cylindrical lower portion 0, whichis termed the neck, preferably of the same diameter as and having abottom rim or hood portion (1 overlapping the upper edge of theair-shaft and fittingas closely the passage of air therethrough at anangle In order to enable the with the air-shaft.

. cowl to revolve so as to present the inlete of the cowl, through whichit extends.

opening to the wind at all times, .I provide a vertical sustaining-shafth, fastened at the tep T 1e lower end of this shaft'is pivotallymountedin an open-work, base 2,, having a central opening 1', into which theend of-the shaft is loosely 25 inserted. This base is provided withintegral outwardly-extending arms in, rigldly fastened 'to the innerwall of the air-shaft by means of nut-and-bolt mechanism in anyordinaryfand well-known manner. To facilitate the rotation of the cowland hold it rigidly'upright,

- thesustaining-shaft above described is made to extend downward intothe air-shaft a considerable distance beyond the bottom of the cowl, asshown, and is rigidly fastened to the top of the cowl at the point Z andagain to the bottom of the cowl y meansof a central basebase-plate'p,having an annular slot the upper surface thereof adapted to contain andplate'o and outwardly-extending arms-n. v To insure the desiredperpendicular rigid:

ity-ne'cessary to withstand the force of, severe winds and sustain'theweight ofthe cow] in an eflicientma'nner, while permitting itseasyrotation under all conditions, I provide .a rigid hold inoperativeposition antifriction-balls 7*,

which plate 'I rigidly mount adjacent to and immediately beneath therevolving base-plate o of the cow] by means of arms 8, which are rigidlyfastened to such ball-bearing plate and extend outwardly and downwardlyto the inner wall of the stationary'air-shaft portion,

to which they are fastened by means of boltand-nut mechanism in anyordinary and well- .known manner.

-In order to shaft, 1' provide a diaphragm t, which is.ar-- ranged toextendfrom the bottom of the in-,

increase the draft i-n the airlet-opening'in the revolving portion ofthe :ventilator upward and inward at an angle to a point preferablybeyond the center of. the

air-shaft and. centrally ofthe horizontal airpassage, leaving the upperhalf of the elbow or head portion the main draft-passage. funnel-shapedportions u I then mount two and o in the inlet- -make oblong incross-section,-as

The cowl is pro- 'fording a open from end to end to form funnels and thetop of the hood and in the di opening,with their small ends extending inward past the end-of the diaphragm towa rd;

shown in Fig '3. These funnels I-p're'ferto shown, and mount them sothat they extend diaphragm and beyond its inner end, the upper centralportion and the entire rear por- -tions thereof'being above thediaphragm and held in place partly by means of the diaphragm throughwhich they extend. A brace w is riveted to eachv funliel' and extendsupward to the top of the hood, to .which it is fastened by means ofrivets in any ordinary and well-known manner. By this arrangement thefunnels form dividing-walls which separate the main draft-passage intodistinct passages, forming currents of diiferent density, which convergewithin the main draftpassage at the desired points to produce the draftefl'ects' sought. J

In order to enable the cowl to be readily turned by light winds, so asto present the in let-opening in the desired direction, a vaiieyis'if'nounted upon the elbow portionextending tl1ereof, 'and the elbowin line with the axis or hood is made to extend outwardly beyond theside of the neck portion on the side which is intended to form theoutlet-opening.

By this'arrangement it will be readily seen that the diaphragm,extending upward atan angle, diminishes the main draft-passage at thedesired point to permit the air to escape from the vertical air-shaftpracticallywithout an interruption, while at the same time extendingupwardly and inwardly, as it does,

passage it causes the incoming air to be com pressed. Upon leaving theedge of the diaphragm the air' as it proceeds in the direction throughthe from the inlet-opening of the the'main draftof the outlet-opening ispermitted to expand and flow rapidly and unreservedly toward suchoutlet-opening, thusproducing the desired draft.- ge

ends at the inlet-opening and their inner en'ds beyond the upper edgeof'the diaphragm operate in a similar manner torompress the air whichpasses through them, permitting it also to expand within the horizontalor main draftpassage and unite with the air which passes over the edgeof the diaphragm in forming the draft in the main draft-passage andindirectly'in the air-shaft. It is desirable that the eddies which wouldresult from the clos- The two-funnel portions being aras described, withtheir expanded mg of the spacebetween the funnels and the outer wall ofthe elbow be prevented from v In order to accomplish this purpose andfreely admit the air therethrough, as above forming.

described, such space is left entirely open, af-

free passage for theair between the rection of the outer opening. Topreventthe by a too acute contact with the current from the air-shaft,the lower edge of the outlet ends of each of such funnels forms anoutwardly etc and downwardly extending flange or lip .2,

Figs. 3 and 6, which in combination with the elements above describedcauses the airfrom the funnels'to unite with that from the airshaft andalso .with that passing over the funnels while all of theicurrents areproceeding in practically identical directions, thus afford ing thegreatest possible speed of current and the minimum of eddies andproducing an effective draft under all conditions.

I claim-A 1. In an apparatus of the character described, the combinationof a rotatable cowl provided with a main draft-passage extendingentirely therethrough in a horizontal direction and having unobstructedopen ends and a vertical downwardly-extending neck portion forming anair-passage communicating at-its' upper end with said. maindraft-passage, and a plurality of open-ended funnels arranged in themain draft-passage longitudinally thereof with the enlarged endsof thefunnels adjacent to the inletend of said passage, said funnels beingdisposed side by side and surrounded by the main draft-passage.

2. In an apparatus of the character described, the combination of arotatable cowl provided with a main draft-passage extendingentirelytherethrough in ahorizontal direction and having unobstructedopen ends and a ver-- tical downwardly extending neck portion forming anair-passage communicating at its upper end with said main draft-passage,a plurality of open-ended funnels arranged in the main draftpassagelongitudinally thereof with the enlarged ends of the funnels adjacent tothe inlet end of said passage, said funnels being disposed side by sideand surrounded by the main draft-passage, andan upwardly'and inwardlyinclined wall dividing the inlet end of the main'draft-passage from thevertical air-passage, said wall embracing thelower portions of thefunnels,

'3. In an apparatus of the character do scribed,.the combination of arotatable cowl provided with a main draft-passage extending entirelytherethrough in a horizontal direction and avertical downwardlyextending neck portion forming" an air-passage communicatscribed, thecombination of a stationary airshaft, a rotatable cowl therein, saidcowl having a vertically-disposed neck registering with the upper end ofthe stationary air-shaft, and

an antifriction-bearing for the cowlcomprising a centrally-arrangedbase-plate in the neck portion thereof located somewhat above the lowerend thereof, upwardly and inwardly inclined braces for said plate, acorrespondinglydisposed'bearing-plate'also arranged withinthe neck ofthe cowl, similarly-arranged braces for said bearing-plate securing thesame to the air-shaft, and balls between the base and bearing plates.

' LOUIS M. WOOD Witnesses:

ARCHIE M. BAI'RD, I. 0. GRANT.

